KR100707282B1 - Concentrating apparatus of sludge - Google Patents

Abstract

The present invention is a sludge concentrating device for condensing sludge by separating and discharging a part of the desorption liquid from the floc and the stripping liquid formed by stirring the sludge and the flocculant, the outer casing having an injection tube into which the sludge and the flocculant are injected and a discharge pipe discharging the floc; A plurality of ring-shaped stationary disks and movable disks are alternately stacked repeatedly so as to have a gap therebetween, and a cylinder having a discharge pipe for discharging the desorption liquid, a drive shaft installed on the central axis of the cylinder and being rotated by external power, It includes a stirrer for stirring the sludge and the flocculant while being rotated between the outer casing and the cylinder by receiving the rotational force of the drive shaft, and a movable disk rotation bar for rotating the movable disk to move relative to the stationary disk by receiving the rotational force of the drive shaft, The disc and the movable disc are in direct contact and along at least one surface of the disc A gap is formed through the repeatedly formed protrusions. The present invention forms a plurality of protrusions on the surface of one disc to form a gap discontinuously inducing the desorption liquid through itself, thereby minimizing the blockage of the floc and smooth induction of the desorption liquid and reducing the number of parts. This simplifies the manufacturing process and reduces costs.

Description

Sludge Concentrator {CONCENTRATING APPARATUS OF SLUDGE}

FIG. 1A is a schematic perspective view of a portion cut away to show a configuration of a sludge concentrating device according to a first embodiment of the present invention; FIG.

FIG. 1B is a partially exploded perspective view of the sludge thickening apparatus shown in FIG. 1A;

FIG. 2A is a schematic perspective view of a portion cut away to show a configuration of a sludge thickening apparatus according to a second embodiment of the present invention; FIG.

FIG. 2B is a partially exploded perspective view of the sludge thickening apparatus shown in FIG. 2A;

FIG. 3A is a schematic perspective view of a portion cut away to show a configuration of a sludge thickening apparatus according to a third embodiment of the present invention; FIG.

3b is a partially exploded perspective view of the sludge thickening apparatus shown in FIG.

4A is a schematic perspective view of a portion cut away to show a configuration of a sludge thickening apparatus according to a fourth embodiment of the present invention;

FIG. 4B is a partially exploded perspective view of the sludge thickening apparatus shown in FIG. 4A;

FIG. 5A is a schematic perspective view of a portion of the sludge thickening apparatus according to the fifth embodiment of the present invention, to illustrate a configuration relationship thereof; FIG.

FIG. 5B is a partially exploded perspective view of the sludge thickening apparatus shown in FIG. 5A.

  ♠ Explanation of symbols on the main parts of the drawing ♠

100: sludge thickener 101: outer casing

105: drive shaft 106a: reducer

107a: fixed disc 107b: movable disc

107b ': projection 108: upper stirrer

108 ': lower stirrer 109: movable disc rotating bar

109a: Vortex forming rotating bar

The present invention relates to a sludge concentrating device, and more particularly, to a sludge concentrating device which concentrates by separating and discharging a part of the desorption liquid in order to increase the concentration of sludge before dewatering the sludge into various dehydrating devices to make a cake.

Each year, the amount of wastewater is increasing rapidly. As a result, the pollution problem of the surrounding environment is seriously raised, and various efforts are being made to effectively treat industrial wastewater.

One such effort is the technique of Patent Publication No. 2004-89469 filed and published by this applicant. This technique is known for a sludge concentrator that concentrates by separating and discharging a portion of the leachate to increase the concentration of sludge. The sludge thickener known in the art is formed by alternately repeatedly stacking the outer casing and alternately having a gap between the movable disc and the stationary disc and is configured to have a cylinder installed inside the outer casing. That is, the sludge concentrator is formed by stirring the sludge and flocculant supplied to the inside of the outer casing with a stirrer to form a floc and the stripping liquid, and guides the stripping liquid to the inside of the cylinder through a gap formed between the movable disk and the fixed disk The sludge was concentrated by draining out of the casing.

However, the device is to install a separate spacer between the movable disk and the stationary disk to form a gap, respectively, by fastening the spacer and the stationary disk by using a fastening pin to integrate. Therefore, the construction relationship is complicated, and the manufacturing cost is increased, and the manufacturing process is complicated because the fastening pins are used to position the spacers between the fixed disks. In particular, as the gap is continuously formed along the edge between the movable disc and the stationary disc, there is a problem that the gap is easily clogged by the fine flocs and thus smooth sludge concentration is impossible.

In addition, the device is coupled to the drive shaft so that a rotating bar that contacts the radial outer surface of the stationary disk and removes some of the flocks attached to the circumferential surface of the disk or inserted into the gap, rotates in the same direction and at the same rotational speed as the stirrer. Therefore, excessive force in one direction is applied to the drive shaft, and a warpage occurs. Also, since the rotating bar and the stirrer rotate at the same direction and at the same rotation speed, the sludge and the flocculant cannot be efficiently stirred, and thus the formation of the flocs is inactive.

Therefore, the present invention has been made to solve the problems of the prior art as described above, by forming a protrusion on the surface of the movable disk and / or fixed disk to form a gap for inducing desorption fluid through the movable disk and the fixed disk itself. The aim is to create a gap that allows for smooth induction of the desorption solution while minimizing blockage of the floc.

In addition, the present invention has another object to prevent the twisting of the drive shaft by activating the flocculation by efficiently stirring the sludge and flocculant by varying the rotation direction and the number of revolutions between the rotating bar and the stirrer.

The sludge thickening apparatus of the present invention includes an outer casing each formed with an inlet tube into which sludge and a flocculant are injected, and a discharge tube for discharging the floc in communication with the outside, and a plurality of ring-shaped stationary disks installed vertically in the outer casing. The cylinder is alternately repeatedly stacked so as to have a gap therebetween, and a cylinder having a discharge pipe for discharging the desorption fluid in communication with the outside, a drive shaft installed on the central axis of the cylinder and being rotated by external power, and a rotational force of the drive shaft. Receiving a rotating stirrer to stir the sludge and the flocculant while rotating between the outer casing and the cylinder, and a movable disc rotating bar for receiving the rotational force of the drive shaft to rotate to move the movable disk relative to the fixed disk And the fixed disc and the movable disc are in direct contact, at least Via the projections repeatedly formed along the surface of the disc is characterized in that to form the gap.

The drive shaft of this invention is further equipped with the speed reducer which decelerates the rotational force in a reverse direction, and it is preferable to mount the said movable disk rotation bar to the said speed reducer.

It is preferable that the speed reducer of this invention is further equipped with the vortex forming rotary bar which forms a vortex while rotating between the said disk and the said stirrer.

In another aspect, the present invention, the outer casing is formed with a discharge pipe for discharging the desorption liquid in communication with the outside, it is installed vertically in the outer casing and a plurality of ring-shaped fixed disk and the movable disk is alternately repeated to have a gap therebetween And a cylinder in which the sludge and the injection pipe into which the flocculant is injected and the discharge pipe communicating with the outside are discharged, respectively, and a drive shaft installed on the central axis of the cylinder and rotating by receiving external power, and the drive shaft. A screw conveyor coupled and rotating in the cylinder to agitate and transport the sludge and the flocculant, and a movable disc rotating member that receives the rotational force of the drive shaft and rotates the movable disc to move relative to the fixed disc, The fixed disk and the movable disk is in direct contact, at least one circle Via the projections repeatedly formed along the surface of it so as to form the gap.

In the following, preferred embodiments of the sludge thickening apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>

FIG. 1A is a schematic perspective view of a portion of the sludge concentrator according to a first embodiment of the present invention, and FIG. 1B is a partially exploded perspective view of the sludge concentrator shown in FIG. 1A.

As shown in Figs. 1A and 1B, the sludge thickening apparatus 100 according to this embodiment is provided with a rectangular columnar or cylindrical outer casing 101, the edge of which is processed into a constant radius of curvature. On the upper side of the outer casing 101, a floc discharge pipe 101a for discharging the floc formed by stirring and mixing the sludge and the flocculant to the outside is formed to extend to the outside by a predetermined length.

The outer casing 101 defines the first space S1, which is a mixing space of the sludge and the coagulant, therein, and at the bottom thereof, a sludge inflow pipe 103 for introducing the sludge and the coagulant into the first space S1. ) And flocculant inlet tube 104 are formed to extend outward by a predetermined length, respectively.

On the other hand, the drive shaft 105 connected to the motor in the longitudinal direction is disposed in the inner center of the outer casing 101, the drive motor 106 for rotating the drive shaft 105 is disposed on the upper outside of the outer casing 101 do. At this time, the drive motor 106 is fixed to the central portion of the upper surface (not shown) of the outer casing 101, and operates by receiving power from an external electric supply source (not shown).

The drive shaft 105 extends across the inside of the outer casing 101 in the vertical direction. At this time, an upper stirrer 108 is disposed around the drive shaft 105, and a lower stirrer is disposed at the lower end of the drive shaft 105. 108 ') is disposed. The upper stirrer 108 is a pair of vertical rods 108a extending in a direction parallel to the drive shaft 105 in the outer casing 101, ie, in the longitudinal direction of the outer casing 101, to support it vertically. It consists of a horizontal rod 108b extending between the upper ends of the rod 108a and fixed to the drive shaft 105. At this time, the vertical rod 108a is further provided with a stirring plate 108c for enabling efficient stirring.

The upper stirrer 108 has an intermediate portion of the horizontal rod 108b fixed integrally to the drive shaft 105, and the lower stirrer 108 ′ is fixed integrally with the lower end of the drive shaft 105. Therefore, the upper and lower stirrers 108 and 108 'are rotated together in the same rotational direction as the drive shaft 105 when the drive shaft 105 is rotated. The upper and lower stirrers 108 and 108 ′ rotate together during the rotation operation of the drive shaft 105 to coagulate and stir the sludge and the coagulant in the first space S1.

On the other hand, the drive shaft 105 is equipped with a reducer 106a for decelerating the driving force of the drive motor 106 in the reverse direction. At this time, the reducer 106a is mounted to the drive shaft 105 at the lower position of the horizontal rod 108b of the upper stirrer 108. The speed reducer 106a is equipped with a movable disc rotating bar 109 for moving the movable disc and a vortex forming rotary bar 109a for forming a vortex in the first space S1 at positions facing each other. At this time, each of the rotary bars 109 and 109a is located radially inward of the upper stirrer 108. Accordingly, each of the rotation bars 109 and 109a rotates in the opposite direction to the drive shaft 105 when the drive shaft 105 rotates, but decelerates and rotates than the drive shaft 105. In this embodiment, the speed reducer 106a which decelerates in the reverse direction by 1/3 of the rotation speed of the drive motor 106 can be used.

In addition, an upper plate 102a, a plurality of movable discs 107b and a stationary disc 107a are stacked and disposed around the drive shaft 105 so as to be positioned inside the rotary bars 109 and 109a. The lower support structure 102b in the shape of a cylindrical enclosure is arranged to be located below 109a. At this time, the lower support structure 102b is fixed to the inner side of the outer casing 101 through the fixing member 102c. The upper plate 102a, the movable disc 107b, the stationary disc 107a, and the lower support structure 102b form a screen-shaped cylinder C having a predetermined gap G, and the desorption liquid is formed therein. The second space S2 to be stored is defined. At this time, the cylinder C is installed vertically in the outer casing 101.

The drive shaft 105 extends into the lower support structure 102b through the ring-shaped movable disk 107b and the fixed disk 107a past the through-hole formed through the center of the upper plate 102a. That is, the drive shaft 105 is provided along the central axis of the cylinder (C). At this time, the movable disc 107b and the fixed disc 107a are alternately arranged in the longitudinal direction, and have a gap G therebetween. The present invention repeatedly forms protrusions along the surfaces of the movable disk 107b and / or the fixed disk 107a to guide the desorption liquid to the second space S2 through the movable disk 107b and the fixed disk 107a itself. It is configured to.

The movable disc 107b of this embodiment is formed in a ring shape and has a plurality of protrusions 107b 'repeatedly formed along its upper and lower surfaces. Here, the protrusion 107b 'serves to form a gap G between the movable disc 107b and the fixed disc 107a in direct contact with the surface of the fixed disc 107a. Therefore, the protrusion 107b 'may be configured in any form as long as it can form the gap G between the movable disc 107b and the stationary disc 107a.

For example, the protrusion 107b 'of this embodiment has a vertical or triangular or rectangular cross section, and has a straight thread formed in a straight line from the outer circumference to the inner circumference of the movable disc 107b, and has a triangular or rectangular cross section up and down and the movable disc ( Helical thread formed helically from the outer periphery to the inner periphery of 107b). In addition, the protrusion 107b 'may be configured in various forms on the surface of the movable disc 107b from the outer circumferential edge to the inner circumference, not continuously. In particular, the protrusion 107b 'is preferably configured to have a rounded protruding surface. More preferably, it is configured to be rotatable on the surface of the movable disc 107b using beads or the like.

The protrusion 107b 'of the present invention can be formed on the stationary disk 107a instead of the movable disk 107b in the same manner as described above. In addition, the protrusion 107b 'of this invention may be formed only in the surface of the movable disk 107b and the fixed disk 107a by the same concept as the above. Therefore, when the movable original plate 107b and the fixed original plate 107a are laminated, a gap G is formed between them. At this time, the gap G is formed discontinuously between the movable disc 107b and the stationary disc 107a by the protrusion 107b 'to minimize the blockage of the fine floc to enable smooth induction of the desorption liquid.

A plurality of fastening protrusions 107c protrude from the radially inner side of the fixed disc 107a, and a pin insertion hole (not shown) is formed in the center of the fastening protrusion 107c. The fixed disk 107a and the movable disk 107b are integrally coupled by a plurality of fastening pins 107g fitted through the pin through holes of the upper plate 102a and the pin insertion holes of the fixed disk 107a.

On the other hand, the movable disk 107b has an outer diameter larger than the outer diameter of the fixed disk 107a, and the movable disk rotating bar 109 is mounted with the same rotation radius as the outer diameter of the fixed disk 107a. Therefore, when the drive shaft 105 is rotated, the movable disc rotating bar 109 moves the movable disc 107b with respect to the fixed disc 107a. At this time, the rotational diameter of the vortex forming rotary bar 109a is mounted larger than the outer diameter of the movable disc 107a. Therefore, the vortex forming rotary bar 109a rotates without any interference with the stationary disk 107a and the movable disk 107b to form a vortex.

On the other hand, on the radial side wall of the lower support structure (102b), the desorbing liquid discharge pipe (101b) is formed to extend to the outside by a predetermined length. The desorbing liquid discharge pipe 101b extends from the radial sidewall of the lower support structure 102b and protrudes outward through the first space S1 and the outer casing 101.

The following describes the operating relationship of the sludge thickening apparatus according to this embodiment configured as described above.

The sludge and the coagulant are introduced into the outer casing 101 through the sludge inlet tube 103 and the coagulant inlet tube 104. The introduced sludge and flocculant are formed by the lower stirrer 108 ′ and the upper stirrer 108, which rotate about the drive shaft 105 as the drive shaft 105 is driven to rotate by the drive motor 106. While flocculating and stirring from the lower layer of S1) to form a flocculant and stripping liquid while gradually moving to the upper layer. At this time, the rotation bars 109 and 109a decelerate and rotate in the opposite direction to the drive shaft 105 by the reduction gear 106a.

As the drive shaft 105 rotates, a floc adheres to the radially outer surfaces of the stationary disk 107a and the movable disk 107b while gradually moving from the lower layer portion to the upper layer portion of the first space S1, and the stuck disk rotates the movable disk. It is detached by the bar 109. And the movable disc 107b which rotates in the opposite direction to the drive shaft 105 contacts the radial outer surface of the stationary disc 107a, so that the movable disc 107b moves in a rotational direction with respect to the stationary disc 107a. The gap G between 107a and the movable disc 107b does not cause clogging due to the fine floc. As such a blockage of the gap G does not occur, the desorption liquid is smoothly introduced into the second space S2 through the gap G, and the desorption liquid introduced into the second space S2 is the desorption outlet. It is discharged to the outside of the outer casing 101 through 101b.

As the desorbing liquid is separated and discharged, the sludge having the concentrated floc is discharged along the discharge pipe 101a and supplied to various dehydration apparatuses.

Second Embodiment

FIG. 2A is a schematic perspective view of a portion of the sludge concentrator according to the second embodiment of the present invention, and FIG. 2B is a partially exploded perspective view of the sludge concentrator shown in FIG. 2A.

2A and 2B, an annular protrusion 117e is formed at one side of the radially outer surface of the movable disc 117b according to this embodiment, and the movable disc rotation bar 119 is formed in the annular protrusion 117e. ) Is fitted and combined. That is, the sludge thickening apparatus 110 of this embodiment is the sludge thickening apparatus of the first embodiment except that the movable disc rotating bar 119 is fitted in the annular protrusion 117e of the movable disc 117b to rotate integrally. It is configured and works the same as (100). Therefore, in this embodiment, the description of the same components and the description of their operation relationship will be omitted.

Third Embodiment

FIG. 3A is a schematic perspective view of a portion of the sludge concentrator according to the third embodiment of the present invention, and FIG. 3B is a partially exploded perspective view of the sludge concentrator shown in FIG. 3A.

As shown in FIGS. 3A and 3B, the sludge concentrating device 120 according to this embodiment includes an outer casing 121 configured by a cylinder or the like to define the first space S1. On the upper side of the outer casing 121, a floc discharge pipe 121a for discharging the floc formed by stirring and mixing the sludge and the flocculant to the outside is formed to extend to the outside by a predetermined length.

The drive shaft 125 is disposed in the longitudinal direction at the inner center of the outer casing 121, and the screw conveyor 125a is integrally mounted to the radially outer surface of the drive shaft 125. Around the drive shaft 125 having the screw conveyor 125a, an upper support structure 122a having an open top, a plurality of movable discs 127b and a stationary disc 127a, and a lower support structure 122b having a cylindrical enclosure shape are provided. Is placed. At this time, the upper support structure 122a, the plurality of movable discs 127b and the stationary disc 127a, which are integrally coupled, are stacked to form a screen-shaped structure having a predetermined gap G, and the lower support structure 122b. Through the cylinder C2 is formed. The second space S2 is defined inside the cylinder C2. At this time, the cylinder C2 is installed vertically in the outer casing 121.

An annular protrusion 127e is formed at one side of the radially outer surface of the stationary disk 127a. The stationary disks 127a are integrally coupled by a fastening rod 129 fitted to the annular protrusion 127e. At this time, the stationary disc 127a and the movable disc 127b are configured in the same manner as the stationary disc 107a and the movable disc 107b mentioned in the first embodiment, so that there is a gap G between them. It is created.

On the other hand, the movable disk 127b is formed to have an inner diameter smaller than that of the fixed disk 127a and smaller than the diameter of the screw conveyor 125a. Therefore, when the drive shaft 125 rotates while the sludge and the flocculant are injected into the second space S2 of the cylinder C2, the floc and the stripping liquid are formed while being stirred and transferred by the screw conveyor 125a, and the stripping liquid is the screw conveyor. As it contacts 125a, it is guided through the gap G, which is smoother by the movable disc 127a moving relative to the stationary disc 127b.

On the radial sidewall of the upper support structure 122a, the floc discharge pipe 121a is formed to extend outward by a predetermined length. The floc discharge pipe 121a extends from the radial sidewall of the upper support structure 122a to cross the first space S1 and then protrude outward through the outer casing 121. And the lower part of the outer casing 121, the desorbing liquid discharge pipe 121b is formed to extend to the outside by a predetermined length.

On the other hand, the sludge inlet pipe 123 and the coagulant inlet pipe 124 for introducing the sludge and the coagulant into the second space (S2) of the cylinder (C2) at the bottom of the lower support structure (122b) to the outside by a predetermined length Each extending.

The following describes the operating relationship of the sludge thickening apparatus according to this embodiment configured as described above.

The sludge and the coagulant are introduced into the second space S2 of the cylinder C2 through the sludge inlet pipe 123 and the coagulant inlet pipe 124. As the introduced sludge and flocculant rotate and drive the drive shaft 125 by the drive motor 126, the flocculating and flocculant is gradually transferred to the upper layer while being coagulated and agitated from the lower layer of the second space S2 by the screw conveyor 125a. Form. The desorbing liquid is guided to the first space S1 through the gap G smoothed by the movable disk 127a moving with respect to the fixed disk 127b as it comes into contact with the screw conveyor 125a, thereby desorbing the desorbing liquid discharge pipe 121b. Is discharged to the outside through, the floc is moved to the upper portion of the second space (S2) is discharged to the outside through the plug discharge pipe (122a).

Fourth Example

FIG. 4A is a schematic perspective view of a portion of the sludge concentrator according to the fourth embodiment of the present invention, and FIG. 4B is a partially exploded perspective view of the sludge concentrator shown in FIG. 4A.

As shown in Figs. 4A and 4B, the drive shaft 135 of this embodiment includes a screw conveyor 135a having a diameter smaller than the inner diameters of the fixed disk 137a and the movable disk 137b, and the movable disk 137b. The movable disk rotating bar 139 larger than the inner diameter and equal to the inner diameter of the fixed disk 137a is mounted. That is, the sludge thickening device 130 of this embodiment is configured to rotate the movable disc 137b through the movable disc rotation bar 139 without rotating the movable disc through the screw conveyor as in the third embodiment. Except for the sludge concentrator 120 of the third embodiment, the same operation is performed. Therefore, in this embodiment, the description of the same components and the description of their operation relationship will be omitted.

In this embodiment, a reduction gear (not shown) for decelerating the driving force of the driving motor 136 in the reverse direction may be mounted on the driving shaft 135, and the same operation disk rotating bar 139 as described above may be mounted on the reduction gear. .

Fifth Embodiment

FIG. 5A is a schematic perspective view of a portion of the sludge concentrator according to a fifth embodiment of the present invention, and FIG. 5B is a partially exploded perspective view of the sludge concentrator shown in FIG. 5A.

As shown in FIGS. 5A and 5B, an annular protrusion 147e is formed on one side of the radially inner surface of the movable disc 147b according to this embodiment, and the movable disc rotation bar 149 is formed in the annular protrusion 147e. ) Is fitted and combined. That is, the sludge thickening apparatus 140 of this embodiment is the sludge thickening apparatus of the fourth embodiment except that the movable disc rotating bar 149 is fitted in the annular protrusion 147e of the movable disc 147b to rotate integrally. It is configured and works the same as 140. Therefore, in this embodiment, the description of the same components and the description of their operation relationship will be omitted.

The sludge thickening apparatus of the present invention forms a plurality of protrusions on the surface of the movable disk and / or the fixed disk to form a gap discontinuously inducing the desorption liquid through itself, thereby minimizing the blockage of the floc and smooth induction of the desorption liquid. Not only is this possible, but the number of parts is reduced, which simplifies the manufacturing process and reduces costs.

In addition, the present invention is effective by stirring the sludge and the flocculant efficiently by varying the rotation direction and the number of revolutions between the rotating bar and the stirrer to activate the flocculation and prevent the distortion of the drive shaft.

Although the technical details of the sludge thickening apparatus of the present invention have been described together with the accompanying drawings, this is illustrative of the best embodiment of the present invention and is not intended to limit the present invention.

It is also apparent that any person skilled in the art can make various modifications and imitations within the scope of the appended claims without departing from the scope of the technical idea of the present invention.

Claims (4)

delete In the sludge thickening apparatus for separating and discharging a part of the stripping liquid from the floc and the stripping liquid formed by stirring the sludge and the flocculant, An outer casing in which the inlet pipe into which the sludge and the flocculant are injected and the discharge pipe discharging the floc in communication with the outside are formed, A cylindrical cylinder installed vertically in the outer casing and having a plurality of ring-shaped stationary disks and movable disks alternately repeatedly stacked so as to have a gap therebetween, and having a discharge pipe for discharging the desorption fluid in communication with the outside; A drive shaft installed on the central shaft of the cylinder and rotating by receiving external power; A reducer mounted on the drive shaft to reduce the rotational force of the drive shaft in a reverse direction; An agitator that receives the rotational force of the drive shaft and stirs the sludge and the flocculant while rotating between the outer casing and the cylinder, and And a movable disc rotating bar mounted to the speed reducer to rotate in a reverse direction with the stirrer to rotate the movable disc to move relative to the fixed disc. The method according to claim 2, The reducer is further equipped with a vortex forming rotary bar to form a vortex while rotating between the disc and the stirrer. The method according to claim 2 or 3, The fixed disk and the movable disk is in direct contact with the sludge thickening apparatus, characterized in that to form the gap through the protrusion repeatedly formed along the surface of at least one disk.

Images